EP2533984A1 - Bicycle hub and method for the production thereof - Google Patents

Bicycle hub and method for the production thereof

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Publication number
EP2533984A1
EP2533984A1 EP11704580A EP11704580A EP2533984A1 EP 2533984 A1 EP2533984 A1 EP 2533984A1 EP 11704580 A EP11704580 A EP 11704580A EP 11704580 A EP11704580 A EP 11704580A EP 2533984 A1 EP2533984 A1 EP 2533984A1
Authority
EP
European Patent Office
Prior art keywords
bicycle hub
wall
sleeve
hub
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11704580A
Other languages
German (de)
French (fr)
Other versions
EP2533984B1 (en
Inventor
Horst Griemla
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2533984A1 publication Critical patent/EP2533984A1/en
Application granted granted Critical
Publication of EP2533984B1 publication Critical patent/EP2533984B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/04—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets
    • B60B27/047—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets comprising a freewheel mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/023—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles

Definitions

  • the invention relates to a bicycle hub according to the preamble of claim 1 and a method for their preparation.
  • Bicycle hubs in particular those having an internal toothing for a coaster brake with freewheel and an internal toothing as a correspondence hub gear, are previously forged from a pipe and finished machined by machining, including in addition to the introduction of the internal gears and a drilling holes of the molded rings counts to be hung in the spokes.
  • the end-side, inner ball raceways are also made by machining, concretely by turning.
  • Bicycle hubs are extremely expensive in relation to the remaining parts of a bicycle.
  • these forged bicycle hubs are relatively heavy, since they must have a correspondingly thick wall as a condition for the shaping of both the forging as well as the machining.
  • this relatively high weight is contrary to requirements, according to which the components should be designed in principle weight-optimized in the sense of weight-reduced.
  • the two hub parts are positively or materially connected to each other, wherein as positive engagement a pressing or riveting is proposed, while the material bond is to be achieved by gluing or welding.
  • a deformation is required, which can affect the concentricity of the bicycle hub.
  • the welding leads to a delay of the hub parts, which can only be eliminated by appropriate straightening.
  • the known construction leads to different diameters of the ball raceways, resulting in disadvantages in use.
  • a desired weight optimization of the bicycle hub is limited by the loads occurring in the region of the ball raceways when driving, which require a corresponding wall thickness of the hub parts, which are essentially continuous in the known bicycle hubs, that is, the wall thickness is measured exclusively on the mentioned load.
  • Another disadvantage of the known bicycle hub is to be considered that the two wheel rims, based on their distance from the respectively associated end face of the bicycle hub are different, so that an end portion of the bicycle hub projects outwardly beyond the connected spokes. Mainly by welding or soldering are the two wreaths on the
  • the invention has for its object to further develop a bicycle hub of the generic type so that with improved load capacity, the sheet used can have a smaller wall thickness and a simplified and less expensive Hersannon is possible.
  • This object is achieved by a bicycle hub with the features of claim 1 and a method for their preparation.
  • the bicycle hub is produced in one piece by deep-drawing and forming a metal blank, in particular a closed blank, wherein after deep-drawing to a pot the bottom is separated and the end regions are shaped accordingly.
  • the one-piece design of the bicycle hub enables extremely cost-effective production since, on the one hand, virtually all operations are possible in an uninterrupted, continuous mechanical process and, on the other hand, the use of materials is optimized.
  • end regions one at a time and to connect them to one another by means of the sleeve, which is then designed as a separate part, or one of the end regions is integrally formed on the sleeve, so that both parts are in one piece.
  • the other end portion as a separate hub part is fitted on the side opposite the molded end portion side on the sleeve.
  • connection of the end region or regions with the sleeve takes place frictionally, for which purpose the diameters corresponding to one another in the sense of a
  • end regions or an end region with a connected sleeve are produced from a blank, which is preferably in closed form, so that with According to the invention, the molding of the respective ring takes place by slipping the end region and then bending radially outward shaped into a ball track.
  • the inventive method can be carried out in an automatic workflow, with corresponding forming machines are connected in succession, while the respective semi-finished product, from which ultimately the bicycle hub is completed, can be fed by automatic feeders.
  • This automatic workflow leads to an extremely low-cost production of bicycle hub, since among other things, the production time is much shorter than that of a bicycle hub according to the prior art.
  • To minimize costs also contributes to the relatively low cost of materials, which results mainly from the relatively thin wall thickness of the sheet used, which experiences sufficient stability by the doubling of the wall in the ball raceways.
  • it is provided to guide the doubling into a covering area with brake shoes which are part of a coaster brake and which, in operation, that is to say during braking, are connected to the brake shoes. nenwandung the sleeve are pressed. The occurring radial forces are absorbed by the double wall, so that a deformation of the bicycle hub in this area is practically impossible.
  • the low weight of the new bicycle hub has an effect on the total weight of the bicycle into which such bicycle hubs are installed, the bicycle hubs according to the invention, modified accordingly, being used for both the rear and the front wheels.
  • FIG. 1 shows an embodiment of a bicycle hub in a longitudinal section
  • Figures 2 and 3 are each a plan view of the bicycle hub Figure 4 is a detail of the bicycle hub of Figure 1 in a longitudinal section
  • FIG. 5 shows another detail of the bicycle hub, also in one
  • Figure 6 shows another embodiment of a bicycle hub in one
  • FIG 7 shows another embodiment of a bicycle hub, also in a longitudinal section.
  • a bicycle hub is shown in each case, which consists of two frictionally interconnected hub parts 1, 2, each having on the opposite sides an end portion 3, 4, in which end lying inside Kugelaufbahnen 8 are formed for receiving rolling balls.
  • Each end region 3, 4 is formed in the region of the ball track 8 as a double wall, on the outer wall of which a ring 6, 7 connects, with holes 11 for receiving spokes.
  • the double wall extends beyond, at least to a region 12 which is defined by a system of brake shoes, not shown, of a positioned inside the bicycle hub coaster brake.
  • the rings 6, 7 are held apart by a sleeve 5 to each other, which is formed in the embodiments of the one end portion 3.
  • the bicycle hub is manufactured by the following process steps:
  • two parallel and spaced apart circumferential internal gears 9, 10 are provided for a hub circuit, one of which is functionally associated with a resignation with freewheel.
  • the internal gears 9, 10 are made as well as the other deformations by cold forming, wherein the teeth of the internal gears 9, 10 are pressed from the outside. In the example shown in FIG. 1, both internal toothings 9, 10 are introduced into the first hub part 1.
  • the ball track 8 of the second hub part 2 is produced by drawing in the inner wall of the double wall formed in this area, the outer wall of which is preferably frictionally engaged with the sleeve 5.
  • the free end of the Kugeilaufbahn 8 is supported on the front side of the sleeve 5 from.
  • the first hub part 1 can be seen as a detail, corresponding to the exemplary embodiment according to FIG. 1. It can be seen that the ring 6 is guided by slipping the hub part 1 produced by deep drawing and radially outward from the end side towards the outside extends.
  • the second hub part 2 is shown in detail, which is pressed onto the cylindrical sleeve 5 of the first hub part 1 until the free end face of the ball track 8 comes to rest on the end face of the sleeve 5.
  • FIG. 1 Another embodiment of the new bicycle hub is shown in FIG.
  • the first hub part 1 has only one internal toothing 9, while the other internal toothing 10 is formed in the second hub part 2.
  • the inner wall of the second hub part 2 forms an inner wall in the covering area with the first hub part 1, while the first hub part 2 bears against the rim 7 on the front side, thus representing a stop when the first 1 is pushed onto the second hub part 2. Both walls form a part of the sleeve 5.
  • the two-part design of the embodiments shown offers the possibility of the second brake hub receiving the second hub part 2 consistently, so assembled form, while the hub gear on taking first hub part 1, depending on the design of the hub gear according to a modified number of gears execute, ie to vary in diameter. Only the overlapping region of the first hub part 1 required for frictional engagement is adapted thereto in each variant embodiment.
  • a bicycle hub is shown, which is integrally formed from a round blank.
  • the right end portion 3 is formed with its rim 6 corresponding to that shown in Figures 1 and 6.
  • the ring 7 is made by folding, so that it is double-layered, while the double wall of the end portion 4 is made by drawing and achsparailele return of the sleeve 5, wherein the double wall of the end portion 4 covers the rim 7.
  • the internal gears 9,10 are spaced from each other in the sleeve 5 introduced.

Abstract

A bicycle hub designed as a shaped sheet metal part, comprising two holes (8) arranged in the end regions (3, 4) for receiving rims (6, 7), which have spokes and which are angled radially outward and held at a distance from each other by a bushing (5), and interior ball races (8) at the ends, is designed such that each end region (3, 4) is shaped as a double wall, forming an inner wall and a directly adjacent outer wall, at least in the region of the ball race (8), wherein the rim (6, 7) adjoins the outer wall.

Description

Fahrradnabe sowie Verfahren zu deren Herstellung  Bicycle hub and method for its production
Die Erfindung betrifft eine Fahrradnabe nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zu deren Herstellung. The invention relates to a bicycle hub according to the preamble of claim 1 and a method for their preparation.
Fahrradnaben, insbesondere solche, die eine Innenverzahnung für eine Rücktrittbremse mit Freilauf sowie eine Innenverzahnung als Korrespondenzteil einer Nabenschaltung aufweisen, werden bislang aus einem Rohr geschmiedet und durch zerspanendes Bearbeiten fertig gesteilt, wozu neben der Einbringung der Innenverzahnungen auch ein Bohren von Löchern der angeformten Kränze zählt, in die Speichen eingehängt werden. Die endseitigen, innenliegenden Kugellaufbahnen sind ebenfalls durch Zerspanen, konkret durch Ausdrehen gefertigt. Naturgemäß sind diese Arbeitsgänge nur mit einem erheblichen Aufwand durchführbar, der zu entsprechend hohen Fertigungskosten führt, so dass die bekannten Bicycle hubs, in particular those having an internal toothing for a coaster brake with freewheel and an internal toothing as a correspondence hub gear, are previously forged from a pipe and finished machined by machining, including in addition to the introduction of the internal gears and a drilling holes of the molded rings counts to be hung in the spokes. The end-side, inner ball raceways are also made by machining, concretely by turning. Naturally, these operations are feasible only with considerable effort, which leads to correspondingly high production costs, so that the known
Fahrradnaben im Verhältnis zu den übrigen Teilen eines Fahrrades außerordentlich teuer sind.  Bicycle hubs are extremely expensive in relation to the remaining parts of a bicycle.
Darüber hinaus sind diese geschmiedeten Fahrradnaben relativ schwer, da sie als Voraussetzung für die Formgebung sowohl des Schmiedens wie auch des Zerspanens eine entsprechend dicke Wand aufweisen müssen. Dies relativ hohe Gewicht steht jedoch Forderungen entgegen, nach denen die Bauteile prinzipiell gewichtsoptimiert im Sinne von gewichtsreduziert gestaltet sein sollen. Moreover, these forged bicycle hubs are relatively heavy, since they must have a correspondingly thick wall as a condition for the shaping of both the forging as well as the machining. However, this relatively high weight is contrary to requirements, according to which the components should be designed in principle weight-optimized in the sense of weight-reduced.
Zur Vermeidung dieser Nachteile wird in der DE 29 06 627 C2 vorgeschlagen, die Fahrradnabe als Blechformteil mit zwei Nabenteiien auszubilden, die jeweils durch Tiefziehen hergestellt sind. To avoid these disadvantages, it is proposed in DE 29 06 627 C2 to design the bicycle hub as a shaped sheet metal part with two hub teeth, each made by deep drawing.
Die beiden Nabenteile sind form- oder stoffschlüssig miteinander verbunden, wobei als Formschluss ein Verpressen oder Vernieten vorgeschlagen wird, während der Stoffschluss durch Verkleben oder Verschweißen erreicht werden soll. Zur Verpressung ist eine Deformation erforderlich, was den Rundlauf der Fahrradnabe beeinträchtigen kann. Das Verschweißen hingegen führt zu einem Verzug der Nabenteile, der nur durch entsprechende Richtarbeiten beseitigt werden kann. The two hub parts are positively or materially connected to each other, wherein as positive engagement a pressing or riveting is proposed, while the material bond is to be achieved by gluing or welding. For compression, a deformation is required, which can affect the concentricity of the bicycle hub. The welding, however, leads to a delay of the hub parts, which can only be eliminated by appropriate straightening.
In jedem Fall sind zusätzliche, kostensteigemde Arbeitsgänge erforderlich, um die beiden Nabenteile miteinander zu verbinden. In any case, additional, kostensteigemde operations are required to connect the two hub parts together.
Im Übrigen führt die bekannte Konstruktion zu unterschiedlichen Durchmessern der Kugellaufbahnen, wodurch sich Verwendungsnachteile ergeben. Insbesondere ist es nicht möglich, eines der beiden Nabenteile als Basisteil für unterschiedliche, im Innern der Fahrradnabe positionierte Nabenschaltungen zu nutzen. Incidentally, the known construction leads to different diameters of the ball raceways, resulting in disadvantages in use. In particular, it is not possible to use one of the two hub parts as a base part for different hub gears positioned inside the bicycle hub.
Eine gewünschte Gewichtsoptimierung der Fahrradnabe ist begrenzt durch die im Bereich der Kugellaufbahnen auftretenden Belastungen im Fahrbetrieb, die eine entsprechende Wandstärke der Nabenteile erfordern, die bei den bekannten Fahrradnaben im Wesentlichen durchgängig sind, d.h., die Wanddicke bemisst sich ausschließlich an der angesprochenen Belastung. Als weiterer Nachteil der bekannten Fahrradnabe ist anzusehen, dass die beiden Radkränze, bezogen auf ihren Abstand zur jeweils zugeordneten Stirnseite der Fahrradnabe unterschiedlich sind, so dass ein Endbereich der Fahrradnabe nach außen hin über die angeschlossenen Speichen vorsteht. Vornehmlich durch Schweißen oder Löten sind auch die beiden Kränze an derA desired weight optimization of the bicycle hub is limited by the loads occurring in the region of the ball raceways when driving, which require a corresponding wall thickness of the hub parts, which are essentially continuous in the known bicycle hubs, that is, the wall thickness is measured exclusively on the mentioned load. Another disadvantage of the known bicycle hub is to be considered that the two wheel rims, based on their distance from the respectively associated end face of the bicycle hub are different, so that an end portion of the bicycle hub projects outwardly beyond the connected spokes. Mainly by welding or soldering are the two wreaths on the
Hülse einer Fahrradnabe befestigt, die in der US 2 997 145 gezeigt und beschrieben ist. Insofern treten die zuvor zum Stoffschluss beschriebenen Nachteile auch bei dieser Fahrradnabe auf. Der Erfindung liegt die Aufgabe zugrunde, eine Fahrradnabe der gattungsgemäßen Art so weiterzuentwickeln, dass bei verbesserter Belastbarkeit das eingesetzte Blech eine geringere Wandstärke aufweisen kann und eine vereinfachte und kostengünstigere Hersteilung möglich ist. Diese Aufgabe wird durch eine Fahrradnabe mit den Merkmalen des Anspruchs 1 sowie ein Verfahren zu deren Herstellung gelöst. Durch die Herstellung einer Doppelwand im Bereich der jeweiligen Kugeliauf- bahn, die entsprechend dem erfindungsgemäßen Verfahren durch Stülpen hergestellt wird, wobei eine gebildete Innen- unmittelbar an einer gebildeten Außenwand anliegt, wird eine sehr hohe Belastungsfähigkeit der Kugellaufbahnen er- reicht, die eine Minimierung der Blechdicke erlaubt, die vorzugsweise 1 ,8 mm beträgt. Attached sleeve of a bicycle hub, which is shown and described in US 2,997,145. In this respect, the disadvantages previously described for material connection also occur in this bicycle hub. The invention has for its object to further develop a bicycle hub of the generic type so that with improved load capacity, the sheet used can have a smaller wall thickness and a simplified and less expensive Hersteilung is possible. This object is achieved by a bicycle hub with the features of claim 1 and a method for their preparation. By producing a double wall in the region of the respective ball track, which is produced by slipping in accordance with the method according to the invention, with an inner lining formed directly against a formed outer wall, a very high loading capacity of the ball tracks is achieved, which minimizes the Sheet thickness allowed, which is preferably 1, 8 mm.
Bevorzugt wird die Fahrradnabe einstückig durch Tiefziehen und Umformen einer Metallronde, insbesondere einer geschlossenen Ronde, hergestellt, wobei nach einem Tiefziehen zu einem Topf der Boden abgetrennt wird und die Endbereiche entsprechend umgeformt werden. Preferably, the bicycle hub is produced in one piece by deep-drawing and forming a metal blank, in particular a closed blank, wherein after deep-drawing to a pot the bottom is separated and the end regions are shaped accordingly.
Die Einstückigkeit der Fahrradnabe ermöglicht eine außerordentlich kostengünstige Herstellung, da zum einen praktisch alle Arbeitsgänge in einem unterbre- chungsfreien kontinuierlichen maschinellen Ablauf möglich sind und zum anderen der Materialeinsatz optimiert ist. The one-piece design of the bicycle hub enables extremely cost-effective production since, on the one hand, virtually all operations are possible in an uninterrupted, continuous mechanical process and, on the other hand, the use of materials is optimized.
Denkbar ist jedoch auch, die Endbereiche jeweils einzeln herzustellen und durch die dann als separates Teil ausgebildete Hülse miteinander zu verbinden oder ei- ner der Endbereiche ist an die Hülse angeformt, so dass beide Teile einstückig sind. Der andere Endbereich als separater Nabenteil ist auf der dem angeformten Endbereich gegenüberliegenden Seite auf die Hülse aufgesteckt. However, it is also conceivable to manufacture the end regions one at a time and to connect them to one another by means of the sleeve, which is then designed as a separate part, or one of the end regions is integrally formed on the sleeve, so that both parts are in one piece. The other end portion as a separate hub part is fitted on the side opposite the molded end portion side on the sleeve.
Die Verbindung des oder der Endbereiche mit der Hülse erfolgt dabei reibschlüs- sig, wozu die miteinander korrespondierenden Durchmesser im Sinne einerThe connection of the end region or regions with the sleeve takes place frictionally, for which purpose the diameters corresponding to one another in the sense of a
Presspassung dimensioniert sind. Wie sich überraschend gezeigt hat, wird durch den Reibschluss eine verdrehfeste Verbindung der Nabenteile erreicht, die allen Belastungen in ausreichendem Maße standhält. Da, im Gegensatz zum Stand der Technik, zur Verbindung die einzelnen Bauteile nicht mehr erwärmt werden müssen, besteht auch nicht die Gefahr des Entstehens von Wärmespannungen und daraus resultierend eines Verziehens, so dass durch die Erfindung eine wesentliche Qualitätsverbesserung, zumindest ohne Nachbearbeitung gegeben ist. Press fit are dimensioned. As has surprisingly been found by the frictional engagement a rotationally fixed connection of the hub parts is achieved, which withstands all loads sufficiently. Since, in contrast to the prior art, to connect the individual components no longer need to be heated, there is also no risk of heat stress and consequent distortion, so that the invention provides a significant improvement in quality, at least without post-processing.
Die Endbereiche bzw. ein Endbereich mit angeschlossener Hülse werden aus einer Ronde hergestellt, die bevorzugt in geschlossener Form vorliegt, so dass mit einem ersten Arbeitsschritt„Tiefziehen" ein Topf geformt wird, dessen Boden anschließend ausgeschnitten wird, so dass sich ein beidseitig offenes Nabenteil ergibt. Die Anformung des jeweiligen Kranzes erfolgt erfindungsgemäß durch Stülpen des Endbereiches und anschließendes Abwinkein radial nach außen. Der zugeordnete Randbereich der Innenseite wird zu einer Kugellaufbahn geformt. The end regions or an end region with a connected sleeve are produced from a blank, which is preferably in closed form, so that with According to the invention, the molding of the respective ring takes place by slipping the end region and then bending radially outward shaped into a ball track.
Das Stülpen, Anformen des Kranzes und Einformen der Kugellaufbahn kann in einem Arbeitsgang erfolgen. Daran schließt sich ein Lochen des Kranzes an, bei dem die Löcher zum Einhängen der Speichen durch Stanzen hergestellt werden. The everting, molding of the ring and molding the ball track can be done in one operation. This is followed by a hole in the wreath, in which the holes for hanging the spokes are made by punching.
Zur Funktion einer Nabenschaltung sind Innenverzahnungen erforderlich, die durch Kaltverformen hergestellt werden, wobei die Innenverzahnungen umlau- fend an einem der beiden Nabenteile oder jeweils an beiden Nabenteilen vorgesehen sein können. For the function of a hub gear internal gears are required, which are produced by cold forming, wherein the internal teeth can be provided circumferentially on one of the two hub parts or on both hub parts.
Besonders einfach sind die Innenverzahnungen durch Eindrücken der zylindrischen Wandung der Hülse herstellbar. Particularly simple internal teeth are produced by pressing the cylindrical wall of the sleeve.
Das erfindungsgemäße Verfahren ist in einem automatischen Arbeitsablauf durchführbar, wobei entsprechende Umformmaschinen nacheinander geschaltet sind, während das jeweilige Halbzeug, aus denen letztendlich die Fahrradnabe fertiggestellt wird, durch Beschickungsautomaten zuführbar ist. The inventive method can be carried out in an automatic workflow, with corresponding forming machines are connected in succession, while the respective semi-finished product, from which ultimately the bicycle hub is completed, can be fed by automatic feeders.
Dieser automatische Arbeitsablauf führt zu einer außerordentlich preiswerten Herstellung der Fahrradnabe, da u.a. die Fertigungszeit wesentlich kürzer ist als die bei einer Fahrradnabe nach dem Stand der Technik. Zur Kostenminimierung trägt überdies der verhältnismäßig geringe Materialeinsatz bei, der sich vor allem aus der relativ dünnen Wandstärke des eingesetzten Blechs ergibt, das durch die Doppelung der Wand im Bereich der Kugellaufbahnen eine ausreichende Stabilität erfährt. Nach einem weiteren Gedanken der Erfindung ist vorgesehen die Dopplung bis in einen Überdeckungsbereich mit Bremsbacken zu führen, die Bestandteil einer Rücktrittsbremse sind und die in Funktion, also bei einer Bremsung, an die in- nenwandung der Hülse gepresst werden. Die dabei auftretenden radialen Kräfte werden durch die Doppelwandung aufgenommen, so dass eine Verformung der Fahrradnabe in diesem Bereich praktisch ausgeschlossen ist. Trotz der geringen Wanddicke, die im Übrigen bei der Verformung hin zu den Nabenteilen im Wesentlichen gleich bleibt, ist die notwendige Stabilität der neuen Fahrradnabe gewährleistet. Hierzu trägt auch bei, dass durch die Verformung zu den Nabenteilen umlaufende Sicken gebildet werden, beispielsweise im Bereich der Kränze, durch die die Formstabilität noch vergrößert wird. This automatic workflow leads to an extremely low-cost production of bicycle hub, since among other things, the production time is much shorter than that of a bicycle hub according to the prior art. To minimize costs also contributes to the relatively low cost of materials, which results mainly from the relatively thin wall thickness of the sheet used, which experiences sufficient stability by the doubling of the wall in the ball raceways. According to a further aspect of the invention, it is provided to guide the doubling into a covering area with brake shoes which are part of a coaster brake and which, in operation, that is to say during braking, are connected to the brake shoes. nenwandung the sleeve are pressed. The occurring radial forces are absorbed by the double wall, so that a deformation of the bicycle hub in this area is practically impossible. Despite the small wall thickness, which otherwise remains substantially the same in the deformation towards the hub parts, the necessary stability of the new bicycle hub is ensured. Contributing to this is also that formed by the deformation of the hub parts circumferential beads, for example in the range of wreaths through which the dimensional stability is still increased.
Naturgemäß hat das geringe Gewicht der neuen Fahrradnabe Auswirkungen auf das Gesamtgewicht des Fahrrades, in das solche Fahrradnaben eingebaut werden, wobei die erfindungsgemäβen Fahrradnaben, entsprechend modifiziert, sowohl für das Hinter- wie auch das Vorderrad Verwendung finden. Naturally, the low weight of the new bicycle hub has an effect on the total weight of the bicycle into which such bicycle hubs are installed, the bicycle hubs according to the invention, modified accordingly, being used for both the rear and the front wheels.
Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Further advantageous embodiments of the invention are characterized in the subclaims.
Das erfindungsgemäße Verfahren wird nachfolgend anhand der in den beigefüg- ten Zeichnungen dargestellten Ausführungsbeispiele einer neuen Fahrradnabe nochmals erläutert. The inventive method will be explained again with reference to the embodiments of a new bicycle hub shown in the attached drawings.
Es zeigen: Figur 1 ein Ausführungsbeispiel einer Fahrradnabe in einem Längsschnitt FIG. 1 shows an embodiment of a bicycle hub in a longitudinal section
Figuren 2 und 3 jeweils eine Draufsicht auf die Fahrradnabe Figur 4 eine Einzelheit der Fahrradnabe nach Figur 1 in einem Längsschnitt Figures 2 and 3 are each a plan view of the bicycle hub Figure 4 is a detail of the bicycle hub of Figure 1 in a longitudinal section
Figur 5 eine weitere Einzelheit der Fahrradnabe, ebenfalls in einem Figure 5 shows another detail of the bicycle hub, also in one
Längsschnitt  longitudinal section
Figur 6 ein weiteres Ausführungsbeispiel einer Fahrradnabe in einem Figure 6 shows another embodiment of a bicycle hub in one
Längsschnitt Figur 7 ein weiteres Ausführungsbeispiel einer Fahrradnabe, ebenfalls in einem Längsschnitt. In den Figuren 1 und 6 ist jeweils eine Fahrradnabe dargestellt, die aus zwei reibschlüssig miteinander verbundenen Nabenteilen 1 , 2 besteht, die jeweils an den einander gegenüberliegenden Seiten einen Endbereich 3, 4 aufweisen, in denen endseitig innen liegende Kugeilaufbahnen 8 eingeformt sind zur Aufnahme von Wälzkugeln. longitudinal section Figure 7 shows another embodiment of a bicycle hub, also in a longitudinal section. In Figures 1 and 6, a bicycle hub is shown in each case, which consists of two frictionally interconnected hub parts 1, 2, each having on the opposite sides an end portion 3, 4, in which end lying inside Kugelaufbahnen 8 are formed for receiving rolling balls.
Jeder Endbereich 3, 4 ist im Bereich der Kugellaufbahn 8 als Doppelwand ausgebildet, an deren Außenwand sich ein Kranz 6, 7 anschließt, mit Löchern 11 zur Aufnahme von Speichen. Die Doppelwand erstreckt sich darüber hinaus, zumindest bis in einen Bereich 12, der durch eine Anlage von nicht dargestellten Bremsbacken einer im Innern der Fahrradnabe positionierten Rücktrittsbremse definiert ist. Each end region 3, 4 is formed in the region of the ball track 8 as a double wall, on the outer wall of which a ring 6, 7 connects, with holes 11 for receiving spokes. The double wall extends beyond, at least to a region 12 which is defined by a system of brake shoes, not shown, of a positioned inside the bicycle hub coaster brake.
Die Kränze 6, 7 sind durch eine Hülse 5 abständig zueinander gehalten, die in den Ausführungsbeispielen an den einen Endbereich 3 angeformt ist. The rings 6, 7 are held apart by a sleeve 5 to each other, which is formed in the embodiments of the one end portion 3.
Die Fahrradnabe wird durch folgende Verfahrensschritte hergestellt: The bicycle hub is manufactured by the following process steps:
- Tiefziehen der beiden Nabenteile 1 , 2 aus je einer Ronde,Deep drawing of the two hub parts 1, 2 from one round plate each,
- Stülpen des rohrförmigen Endbereiches 3, 4 des jeweiligen Nabentei- les, unter Bildung einer Innen- und einer anliegenden Außenwand zu einer Doppelwand, - everting the tubular end region 3, 4 of the respective hub part, forming an inner and an adjacent outer wall to form a double wall,
- Abwinkein der Außenwand zu dem radial umlaufenden Kranz 6, 7 - Anwinkein the outer wall to the radially encircling ring 6, 7th
- Formen der Innenwand des Endbereiches 3, 4 zur Kugellaufbahn 8,Shaping the inner wall of the end region 3, 4 to the ball track 8,
- Lochen des Kranzes 6, 7 - Punching the wreath 6, 7
- Ineinanderstecken der beiden Nabenteile 1 , 2.  - Nesting of the two hub parts 1, 2.
Weiterhin sind zwei parallel und abständig zueinander angeordnete umlaufende Innenverzahnungen 9, 10 für eine Nabenschaltung vorgesehen, von denen eine funktional einem Rücktritt mit Freilauf zugeordnet ist. Die Innenverzahnungen 9, 10 sind ebenso wie die übrigen Verformungen durch Kaltverformen hergestellt, wobei die Zähne der Innenverzahnungen 9, 10 von außen her eingedrückt sind. Bei dem in der Figur 1 gezeigten Beispiel sind beide Innenverzahnungen 9, 10 in das erste Nabenteil 1 eingebracht. Furthermore, two parallel and spaced apart circumferential internal gears 9, 10 are provided for a hub circuit, one of which is functionally associated with a resignation with freewheel. The internal gears 9, 10 are made as well as the other deformations by cold forming, wherein the teeth of the internal gears 9, 10 are pressed from the outside. In the example shown in FIG. 1, both internal toothings 9, 10 are introduced into the first hub part 1.
Die Kugellaufbahn 8 des zweiten Nabenteiles 2 ist durch Einziehen der Innenwandung der in diesem Bereich gebildeten Doppelwand hergestellt, deren Au- ßenwand an der Hülse 5 bevorzugt reibschlüssig anliegt. The ball track 8 of the second hub part 2 is produced by drawing in the inner wall of the double wall formed in this area, the outer wall of which is preferably frictionally engaged with the sleeve 5.
Dabei stützt sich die freie Stirnseite der Kugeilaufbahn 8 an der Stirnseite der Hülse 5 ab. In der Figur 4 ist das erste Nabenteil 1 als Einzelheit erkennbar, entsprechend dem Ausführungsbeispiel nach Figur 1. Es ist zu sehen, dass der Kranz 6 durch Stülpen des durch Tiefziehen hergestellten Nabenteiles 1 geführt ist und sich radial, abständig von der Endseite nach außen hin erstreckt. In der Figur 5 ist das zweite Nabenteil 2 als Einzelheit gezeigt, das auf die zylindrische Hülse 5 des ersten Nabenteiles 1 aufgepresst wird, bis die freie Stirnseite der Kugellaufbahn 8 an der Stirnseite der Hülse 5 zur Anlage kommt. Here, the free end of the Kugeilaufbahn 8 is supported on the front side of the sleeve 5 from. In FIG. 4, the first hub part 1 can be seen as a detail, corresponding to the exemplary embodiment according to FIG. 1. It can be seen that the ring 6 is guided by slipping the hub part 1 produced by deep drawing and radially outward from the end side towards the outside extends. In the figure 5, the second hub part 2 is shown in detail, which is pressed onto the cylindrical sleeve 5 of the first hub part 1 until the free end face of the ball track 8 comes to rest on the end face of the sleeve 5.
Ein weiteres Ausführungsbeispiel der neuen Fahrradnabe ist in der Figur 6 ge- zeigt. Hier weist das erste Nabenteil 1 lediglich eine Innenverzahnung 9 auf, während die andere Innenverzahnung 10 in das zweite Nabenteil 2 eingeformt ist. Another embodiment of the new bicycle hub is shown in FIG. Here, the first hub part 1 has only one internal toothing 9, while the other internal toothing 10 is formed in the second hub part 2.
Durch Stülpen des Endbereiches 4 des zweiten Nabenteiles 2 und Abwinkein wird der radial nach außen gerichtete Kranz 7 geformt. Die Innenwand des zwei- ten Nabenteiles 2 bildet im Überdeckungsbereich mit dem ersten Nabenteil 1 eine Innenwandung, während das erste Nabenteil 2 stirnseitig am Kranz 7 anliegt, der damit einen Anschlag beim Aufschieben des ersten 1 auf das zweite Nabenteil 2 darstellt. Beide Wände bilden dabei einen Teil der Hülse 5. Die zweiteilige Ausbildung der gezeigten Ausführungsbeispiele bietet die Möglichkeit, das die Rücktrittsbremse aufnehmende zweite Nabenteil 2 gleichbleibend, also konfektioniert, auszubilden, während das die Nabenschaltung auf- nehmende erste Nabenteil 1 , je nach Ausführung der Nabenschaltung entsprechend einer veränderten Gangzahl auszuführen, d.h. im Durchmesser zu variieren. Lediglich der zum Reibschluss erforderliche Überdeckungsbereich des ersten Nabenteiles 1 ist bei jeder Ausführungsvariante daran angepasst. By inverting the end region 4 of the second hub part 2 and the bend, the radially outwardly directed rim 7 is formed. The inner wall of the second hub part 2 forms an inner wall in the covering area with the first hub part 1, while the first hub part 2 bears against the rim 7 on the front side, thus representing a stop when the first 1 is pushed onto the second hub part 2. Both walls form a part of the sleeve 5. The two-part design of the embodiments shown offers the possibility of the second brake hub receiving the second hub part 2 consistently, so assembled form, while the hub gear on taking first hub part 1, depending on the design of the hub gear according to a modified number of gears execute, ie to vary in diameter. Only the overlapping region of the first hub part 1 required for frictional engagement is adapted thereto in each variant embodiment.
In der Figur 7 ist eine Fahrradnabe dargestellt, die einstückig aus einer Ronde gebildet ist. In the figure 7, a bicycle hub is shown, which is integrally formed from a round blank.
Hierbei ist der rechte Endbereich 3 mit seinem Kranz 6 entsprechend dem in den Figuren 1 und 6 dargestellten geformt. Here, the right end portion 3 is formed with its rim 6 corresponding to that shown in Figures 1 and 6.
Bei dem gegenüberliegenden Endbereich 4 hingegen ist der Kranz 7 durch Faltung hergestellt, so dass er doppellagig ausgebildet ist, während die Doppelwandung des Endbereiches 4 durch Einziehen und achsparailele Rückführung der Hülse 5 hergestellt ist, wobei die Doppelwand des Endbereiches 4 den Kranz 7 überdeckt. Bei dieser Ausführungsvariante sind die Innenverzahnungen 9,10 abständig zueinander in die Hülse 5 eingebracht. In the opposite end region 4, however, the ring 7 is made by folding, so that it is double-layered, while the double wall of the end portion 4 is made by drawing and achsparailele return of the sleeve 5, wherein the double wall of the end portion 4 covers the rim 7. In this embodiment, the internal gears 9,10 are spaced from each other in the sleeve 5 introduced.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Nabenteil1 hub part
2 Nabenteil2 hub part
3 Endbereich3 end area
4 Endbereich4 end area
5 Hülse 5 sleeve
6 Kranz  6 wreath
7 Kranz  7 wreath
8 Kugellaufbahn 8 ball raceway
9 Innenverzahnung9 internal toothing
10 Innenverzahnung10 internal toothing
11 Loch 11 holes
12 Bereich  12 area

Claims

Ansprüche 1. Als Blechformteil ausgebildete Fahrradnabe, mit zwei in den Endbereichen (3, 4) angeordneten Löcher (8) zur Aufnahme von Speichen aufweisenden, radial nach auSen abgewinkelten Kränzen (6, 7), die durch eine Hülse (5) abständig zueinander gehalten sind, sowie endseitigen, innenliegenden Ku- geilaufbahnen (8), dadurch gekennzeichnet, dass jeder Endbereieh (3, 4} zumindest im Bereich der Kugellaufbahn (8) unter Bildung einer Innenwand und einer unmittelbar anliegenden Außenwand als Doppelwand geformt ist, wobei sich der Kranz (6, 7) an die Außenwand anschließt. Claims 1. Trained as a sheet metal part bicycle hub, with two in the end regions (3, 4) arranged holes (8) for receiving spokes having radially outwardly angled wreaths (6, 7) held by a sleeve (5) to each other are, as well as end-side, inner Küüsilaufbahnen (8), characterized in that each Endbereieh (3, 4} at least in the region of the ball raceway (8) to form an inner wall and a directly adjacent outer wall is formed as a double wall, wherein the garland (6, 7) connects to the outer wall.
2. Fahrradnabe nach Anspruch 1, dadurch gekennzeichnet, dass diese 2. bicycle hub according to claim 1, characterized in that this
einstückig ausgebildet ist,  is formed in one piece,
3. Fahrradnabe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass diese aus mehreren, reibschlüssig miteinander verbundenen Nabenteilen (1, 2} besteht. 3. bicycle hub according to claim 1 or 2, characterized in that it consists of several frictionally interconnected hub parts (1, 2}.
4. Fahrradnabe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Doppelwand zumindest einen Bereich (12) überdeckt, der durch in Funktion anliegende Bremsbacken einer Rücktrittsbremse definiert ist. 4. Bicycle hub according to one of the preceding claims, characterized in that the double wall covers at least a region (12) which is defined by applied in function brake shoes of a coaster brake.
5. Fahrradnabe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Endbereiche (3, 4) und die Hülse (5) jeweils ais separate Teile ausgebildet sind . 5. Bicycle hub according to one of the preceding claims, characterized in that the end regions (3, 4) and the sleeve (5) are each formed as separate parts.
6. Fahrradnabe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Endbereich (3) einstückig mit der Hülse (5) ausgebildet ist, 6. Bicycle hub according to one of the preceding claims, characterized in that an end region (3) is formed integrally with the sleeve (5),
7. Fahrradnabe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Hülse (5) abständig zueinander angeordnet oder das erste und/oder das zweite Nabenteii (1 , 2) Jeweils eine innenverzahnung (9, 10) aufweisen. 7. bicycle hub according to one of the preceding claims, characterized in that the sleeve (5) arranged at a distance from each other or the first and / or the second Nabenteii (1, 2) each have an internal toothing (9, 10).
8. Verfahren zur Hersteilung einer Fahrradnabe, mit zwei, in den Endbereichen (3, 4) angeordneten, Löcher (8) zur Aufnahme von Speichen aufweisenden Kränzen (6, 7), die durch eine Hülse (5) abständig zueinander gehaiten sind, sowie endseitigen, innenliegenden Kugellaufbahnen (8), wobei die Endberei- che (3, 4} durch Tiefziehen gebildet und der jeweils zugeordnete Kranz (6, 7) und die jeweilige Kugellaufbahn (8) spanlos angeformt werden, dadurch gekennzeichnet, das jeder Endbereich (3, 4) unter Bildung einer innen- und einer Außenwand zu einer Doppelwand zumindest im Bereich der Kugellaufbahn (8) durch Stülpen und die Kränze (6, 7) durch Abwinkein und/oder Falten der Außenwandung hergestellt werden, 8. A method for the production of a bicycle hub, with two, in the end regions (3, 4) arranged, holes (8) for receiving spokes having wreaths (6, 7), the gehaiten by a sleeve (5) to each other, and The end regions (3, 4) are formed by deep-drawing and the respectively assigned ring (6, 7) and the respective ball raceway (8) are formed without cutting, characterized in that each end region (3 , 4) to form an inner and an outer wall to a double wall at least in the region of the ball raceway (8) by everting and the wreaths (6, 7) are prepared by Anwinkein and / or folding the outer wall
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, das die Hülse (5) und die angeschlossenen Endbereiehe durch Tiefziehen einer vorzugsweise geschlossenen Ronde einstückig ausgebildet werden. 9. The method according to claim 8, characterized in that the sleeve (5) and the connected Endbereiehe are formed by deep drawing a preferably closed Ronde in one piece.
10. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Endbereiche (3, 4) aus Mabenteiieh (1 , 2) gebildet werden, die jeweils aus einer geschlossenen Ronde zu einem Topf tiefgezogen werden und der gebildete Boden, vorzugsweise durch Lochen entfernt wird. 10. The method according to claim 8 or 9, characterized in that the end regions (3, 4) from Mabenteiieh (1, 2) are formed, which are deep-drawn from a closed blank to a pot and the soil formed, preferably removed by punching becomes.
11. Verfahren nach einem der Ansprüche 8-10, dadurch gekennzeichnet, dass zumindest eine Kugeilaufbahn (8) durch Einziehen nach innen hergestellt wird. 11. The method according to any one of claims 8-10, characterized in that at least one Kugeilaufbahn (8) is made by drawing inward.
12. Verfahren nach einem der Ansprüche 8-11 , dadurch -gekennzeichnet, dass in die Hülse (5) eine umlaufende Innenverzahnung (9, 10) eingeformt wird. 12. The method according to any one of claims 8-11, characterized - in that in the sleeve (5) has a circumferential internal toothing (9, 10) is formed.
13. Verfahren nach einem der Ansprüche 8-12, dadurch gekennzeichnet, dass die Formung der Innenverzahnung (9, 10) durch Eindrücken von der Außenseite her erfolgt. 13. The method according to any one of claims 8-12, characterized in that the shaping of the internal toothing (9, 10) takes place by pressing in from the outside.
EP11704580.7A 2010-02-09 2011-02-09 Bicycle hub and method for the production thereof Active EP2533984B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010000343 2010-02-09
PCT/EP2011/051879 WO2011098476A1 (en) 2010-02-09 2011-02-09 Bicycle hub and method for the production thereof

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EP2533984A1 true EP2533984A1 (en) 2012-12-19
EP2533984B1 EP2533984B1 (en) 2015-04-08

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US (1) US9238385B2 (en)
EP (1) EP2533984B1 (en)
JP (1) JP2013518763A (en)
CN (1) CN102753358B (en)
DE (1) DE102011000584A1 (en)
ES (1) ES2541617T3 (en)
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CN102753358B (en) 2016-02-03
DE102011000584A1 (en) 2011-08-11
US20120306258A1 (en) 2012-12-06
JP2013518763A (en) 2013-05-23
US9238385B2 (en) 2016-01-19
CN102753358A (en) 2012-10-24
ES2541617T3 (en) 2015-07-22
WO2011098476A1 (en) 2011-08-18
EP2533984B1 (en) 2015-04-08

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